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. 2021 Nov 29;40(5):443–457. doi: 10.1007/s11604-021-01224-3

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© The Author(s) 2021

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Fig. 4 — MRI of a 50-year-old man with a complaint of sudden left knee pain. a Coronal fat-suppressed proton density-weighted image (FS-PDWI), and b sagittal FS-PDWI show extensive bone marrow edema-like signal intensity over the medial femoral condyle (asterisk). A subchondral hypointense line is observed a few millimeters above the subchondral plate (arrow). Note that the line is almost parallel to the subchondral plate and open-ended in the medial part